Did you make this instructable?

From your link, it looks like you can dissect a Snickers bar and extract the nuts or add a caramel layer to a Three Musketeers bar, both of which are available in many sizes and 5lb bags to experiment with. Make your own wrapper by printing out the label image on thin paper and wrap the new candy bar. Good luck.

Well, this is why I was hoping for someone with some experience tasting the original bar. You can't just throw something like this together and hope for the best. It helps to know the right taste to get the proper mixture.

You could email the curator of the candywrappermuseum and ask if there are any recipies since I think you want to make one from scratch. If not, just experiment and ask your Dad what was different than he remember it as when he samples the goods.